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U1000 code in owner complaints

Code U1000 is named in 27 US owner complaints, 1 of them (4%) after a crash. Models: 17, model years 2001–2019.

There is little data for this code or its meaning is ambiguous, so this page is not indexed.

What the code means

This is a manufacturer-specific code: the meaning depends on the make and sometimes on the year.

How to read U1000: the letter U means network communication between modules; the second digit 1 marks a manufacturer code whose meaning is set by the make; the last three characters 000 identify the specific fault.

Codes for engine, transmission, transfer case and hybrid system modules. When valuing an auction car the key question is whether the fault is crash related (cut wiring, damaged radiator) or a known defect of the model.

Key figures

Complaints with this code
27
after a crash
1 (4%)
Models
17
Model years
2001–2019

Which models and years

Models whose owners name this code (17). Years link to the model year problems page.

Model Years Complaints
Nissan Altima 2002, 2012, 2019 3
Nissan Murano 2005 3
Nissan Pathfinder 2007, 2008 3
Nissan Rogue 2010, 2015, 2016 3
Nissan Leaf 2015 2
Nissan Xterra 2007 2
Buick Regal 2001 1
Chevrolet Equinox 2011 1
Chevrolet Malibu 2003 1
Chevrolet Trailblazer 2003 1
Dodge Charger 2006 1
Infiniti G35 2004 1
Infiniti QX80 2017 1
Mazda Mazda3 2013 1
Nissan Armada 2006 1
Nissan NV 2018 1
Saturn L300 2005 1

Components named together with the code

Component as the owner filed it (one complaint can list several).

Complaints by model year

What to do if an auction car has this code

What owners report

Excerpts of owner complaints in the original wording. Owner statements not verified by the regulator; personal data removed.

Sources: public official US data (owner complaints) and the SAE J2012 standard. Complaints are owner statements not verified by the regulator. A code from a complaint does not replace a scan tool diagnosis. Data updated 2026-11-10.